All questions
Question 1
Books must stay upright. Test: Design 1 held 5/5; Design 2 held 3/5. Which works better?
- Design 2 works better because it held 3/5 books, so it is more stable for keeping books upright.
- Design 1 works better because test showed 5/5 books stayed up, but Design 2 only kept 3/5. (correct answer)
- Both designs work the same because they both held some books, so either one is the best choice.
- Design 1 works better because it looks stronger, even if we do not use the test results.
Explanation: We are comparing designs. Design 1 kept all 5 books up. Design 2 only kept 3 books up. More books staying up is better!
Question 2
Carry 8 items without dropping. Test: Design 1 delivered 8/8; Design 2 delivered 5/8. Which works better?
- Design 2 works better because it delivered 5/8 items, so it is the most reliable for carrying.
- Design 1 works better because it delivered 8/8 items, but Design 2 delivered only 5/8 in the test. (correct answer)
- Design 1 works better because it is deeper, and depth matters more than the test results.
- Both work the same because each design carried at least one item, so they are equally good.
Explanation: We are testing which carries items best. Design 1 carried all 8 items safely. Design 2 dropped 3 items. No drops is better!
Question 3
Test results: Basket delivered 8/8 items; tray delivered 5/8. Which design should we use? Why?
- Design 2 works better because it delivered 5/8 items, so it drops fewer things than Design 1.
- Design 1 works better because it delivered 8/8 items, while Design 2 delivered 5/8, so it is reliable. (correct answer)
- Design 1 works better because baskets are bigger, but the test results do not matter here.
Explanation: We check which design works best. The basket carried all 8 items safely. The tray dropped 3 items. No drops is better!
Question 4
Step stool test: Two-step was easy; one-step was hard. Which design works better for safe reaching?
- Design 2 works better because one big step is harder, and hard climbing means it is safer.
- Design 1 works better because it was easy to climb and reached the sink, while Design 2 was hard to climb. (correct answer)
- Both work the same because both reached the sink, so easy or hard climbing does not matter.
Explanation: We check which is safer. Two steps were easy to climb. One big step was hard. Easy and safe go together!
Question 5
Test data: Canopy covered 36 sq ft; umbrellas covered 18 sq ft. Which works better for shade?
- Design 1 works better because it covered 36 sq ft, and Design 2 covered 18 sq ft, so more shade. (correct answer)
- Design 2 works better because 18 sq ft is more than 36 sq ft, so it shades more.
- Design 2 works better because umbrellas look nicer, even if coverage is smaller in the test.
Explanation: We compare numbers from tests. 36 square feet is bigger than 18. The canopy makes more shade. Big shade is better!
Question 6
Books must stay upright. Test: Design 1 held 5/5; Design 2 held 3/5. Which should we use? Why?
- Design 1 should be used because it held 5/5 books, while Design 2 held only 3/5 in the stability test. (correct answer)
- Design 2 should be used because it held fewer books, and fewer books means it is safer for shelves.
- Either design should be used because both held books, and the numbers do not help us decide.
- Design 1 should be used because it is shaped like an L, and L shapes are always best.
Explanation: We are choosing for upright books. Design 1 held all 5 books up. Design 2 only held 3 books up. All books up is better!
Question 7
Get a toy car to the top. Test: Design 1 reached top; Design 2 rolled back. Which ramp works better?
- Design 2 works better because it is steeper, even though the test showed the car rolled back down.
- Both ramps work the same because both are ramps, so the car should reach the top either way.
- Design 1 works better because the test showed the car reached the top, but Design 2 failed and rolled back. (correct answer)
- Design 1 works better because rolling back means it went faster, so Design 2 is worse at speed.
Explanation: We want the car to reach the top. Design 1 got the car all the way up. Design 2 made the car roll back down. Reaching the top is better!
Question 8
Test results: L-shape held 5/5 books; wedge held 3/5. Which should we choose? Why?
- Choose Design 1 because it held 5/5 books, and Design 2 held 3/5, so Design 1 is steadier. (correct answer)
- Choose Design 2 because it held fewer books, and fewer books means it is stronger for this job.
- Choose Design 1 because it looks cooler, and looks are more important than test results.
Explanation: We pick based on test results. Design 1 held all 5 books steady. Design 2 only held 3 books. Pick the one that holds more books.
Question 9
Test results: long spout had 0 spills in 3 tries; short spout had 3 spills. Which works better?
- Design 1 works better because it had 0 spills in 3 tries, while Design 2 spilled 3 times. (correct answer)
- Design 2 works better because it spilled 3 times, and spilling means it watered more plants.
- Design 1 works better because it is longer, and longer tools are always better than shorter ones.
Explanation: We are testing which waters without spilling. The long spout had zero spills. The short spout spilled every time. No spills means it works better.
Question 10
Test results: wide base stayed stable 5/5 bumps; narrow base stable 3/5. Which works better?
- Design 2 works better because it was stable 3/5 bumps, which is more stable than 5/5 bumps.
- Design 1 works better because it stayed stable 5/5 bumps, while Design 2 was stable 3/5 bumps. (correct answer)
- Both designs work best because they both got bumped, and bumping is the only thing that matters.
Explanation: We are testing which stays steady. The wide base stayed up for all 5 bumps. The narrow base fell after 3 bumps. More bumps without falling is better.
Question 11
Test results: deep basket delivered 8/8 items; shallow tray delivered 5/8. Which design works better?
- Design 2 works better because it delivered 5/8 items, so it must be safer for carrying.
- Design 1 works better because it delivered 8/8 items, while Design 2 delivered 5/8, so fewer fell. (correct answer)
- Design 1 works better because it has a handle, and handles are always best, no test needed.
Explanation: We are testing which carries items safely. The deep basket kept all 8 items safe. The shallow tray dropped 3 items. No drops means it works better.
Question 12
Test results: L-shape held 5/5 books; wedge held 3/5. Which design works better?
- Design 2 works better because it held only 3/5 books, so it is more stable for books.
- Design 1 works better because it held 5/5 books, and Design 2 held 3/5, so it is steadier. (correct answer)
- Design 1 works better because I like the L-shape more, so it must hold books better.
Explanation: We look at test results. Design 1 held all 5 books. Design 2 only held 3 books. More books means better!
Question 13
Test results: two-step stool was easy and safe; one-step was hard. Which design works better?
- Design 1 works better because the child climbed easily and safely, but Design 2 was hard to climb. (correct answer)
- Design 2 works better because it has one step, and fewer steps always means it is safer.
- Both stools work the same because both reached the sink, so easy and hard do not matter.
Explanation: We need a safe stool for kids. The two-step stool was easy to climb. The one-step was too hard. Easy and safe is what works better.
Question 14
Watering test for high plants: Long spout had 0/3 spills; short spout had 3/3 spills. Which works better?
- Design 1 works better because it had 0 spills in 3 trials, while Design 2 spilled 3 times in 3 trials. (correct answer)
- Design 2 works better because it spilled 3/3 times, so it must water more plants on a high shelf.
- Design 1 works better because it is longer, but I cannot use the test results to decide.
Explanation: We count spills in our test. Long spout had zero spills. Short spout spilled every time. No spills means it works!
Question 15
Ramp test: Long ramp reached top; short ramp rolled back. Which design solves the problem better?
- Design 2 works better because it is steeper, even though the car rolled back in the test.
- Design 1 works better because the car reached the top, and Design 2 failed and rolled back down. (correct answer)
- Both designs work the same because ramps are ramps, so the test does not change anything.
Explanation: We test which ramp works. The long ramp got the car up. The short ramp made it roll back. Getting up is success!
Question 16
Toy scoop test: Wide scoop 45 sec; narrow scoop 120 sec. For speed, which design is better?
- Design 2 is better for speed because 120 seconds is faster than 45 seconds when picking up toys.
- Design 1 is better for speed because it took 45 seconds, and Design 2 took 120 seconds to collect toys. (correct answer)
- Both are best because each scoop can pick up toys, so time does not matter in this test.
Explanation: We measure time to pick up. 45 seconds is faster than 120 seconds. Less time means quicker cleanup. Fast is better!
Question 17
Test results: L-shape held 5/5 books; wedge held 3/5. Which should we pick? Use data.
- Design 1 works better because it held 5/5 books, and Design 2 held 3/5, so it meets the goal. (correct answer)
- Design 2 works better because it held fewer books, and fewer means it is stronger for holding books.
- Design 1 works better because it is my favorite, so it must be the best book holder.
Explanation: We use test data to decide. L-shape held all 5 books. Wedge only held 3 books. Data shows L-shape wins!
Question 18
Test results: canopy shaded 36 sq ft; two umbrellas shaded 18 sq ft. Which works better?
- Design 1 works better because it shaded 36 sq ft, while Design 2 shaded 18 sq ft, so it covers more. (correct answer)
- Design 2 works better because two umbrellas look nicer, even though they shaded only 18 sq ft.
- Both designs are best because 18 sq ft and 36 sq ft are the same amount of shade.
Explanation: We are looking at which gives more shade. The canopy made 36 square feet of shade. The umbrellas made only 18 square feet. More shade is better for staying cool.
Question 19
Jar holder test: Wide base stayed stable 5/5 bumps; narrow base stable 3/5. Which works better?
- Design 1 works better because it stayed stable 5/5 bumps, while Design 2 stayed stable 3/5 bumps. (correct answer)
- Design 2 works better because it was stable 3/5 bumps, so it is safer than 5/5 bumps.
- Design 1 works better because it looks wider, and looks are the best evidence for stability.
Explanation: We test how steady things are. Wide base stayed steady all 5 bumps. Narrow base tipped after 3 bumps. Steady is safer!
Question 20
Test results: wide scoop 45 sec, misses under couch; narrow scoop 120 sec, reaches all. Which is better?
- Design 1 is better for speed because it took 45 seconds, but Design 2 is better to reach all toys. (correct answer)
- Design 2 is always better because it is skinny, and skinny tools are the best for any job.
- Design 1 is always better because 120 seconds is smaller than 45 seconds, so it is faster.
Explanation: We have two different needs here. The wide scoop is fast but misses some toys. The narrow scoop is slow but gets all toys. Each is better for different jobs.